Published in
Royal Society of Chemistry, Polymer Chemistry, 3(5), p. 712-717
DOI: 10.1039/c3py01442h
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Gigantic chiroptical enhancements in polyfluorene copolymers bearing bulky neomenthyl groups: Importance of alternating sequences of chiral and achiral fluorene units
Journal article published in 2013 by
Kento Watanabe,
Yasuhito Koyama,
Nozomu Suzuki,
Michiya Fujiki 
,
Tamaki Nakano
,
Tamaki Nakano
This paper is available in a repository.
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Abstract
An alternating copolymer consisting of achiral and chiral units emits remarkably efficient CPL on photo-excitation. The main-chain twist bias is enhanced by thermal annealing by the factor of 104 in the ground state. An anisotropy factor of the polymer in the excited state is greater by approximately an order of magnitude compared with that in the ground sate.